In Arthurian legend, the father of Galahad (8)

I believe the answer is:

lancelot

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'father of galahad' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for lancelot that I've seen before include "Round Table member" , "legendary knight" , "'Knight of the round table, Guinevere's lover (8)'" , "A Knight of the Round Table, lover of Guinevere (8)." , "Call tone for knight of Arthurian legend" .)

I've seen this clue in The Times.

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